Beneficial effect of Ni substitution on the thermoelectric properties in partially filled Ca{sub y}Co{sub 4-x}Ni{sub x}Sb{sub 12} skutterudites
Beneficial effect of Ni substitution on the thermoelectric properties in partially filled Ca{sub y}Co{sub 4-x}Ni{sub x}Sb{sub 12} skutterudites
复制标题
DOI：
10.1063/1.1868083
复制
发表时间：
2005-04
影响因子：
3.2
通讯作者：
M. Puyet;A. Dauscher;B. Lenoir;M. Dehmas;C. Stiewe;E. Müller;Jiri Hejtmanek
中科院分区：
文献类型：
--
作者：
M. Puyet;A. Dauscher;B. Lenoir;M. Dehmas;C. Stiewe;E. Müller;Jiri Hejtmanek
研究了镍掺杂对部分填充钙的一系列n型CoSb{sub3}方解石材料的影响。在300-800K温度范围内，测量了粉末冶金法制备的Ca{suby}Co{sub1-x}Ni{subx}Sb{sub12}化合物的电阻率、热电势和热导率。用电子探针和X射线衍射仪分别对其化学成分和结构进行了分析。研究发现，镍的存在大大降低了材料的电阻率，但对热电偶没有任何不利影响，从而提高了功率因数。无量纲热电系数ZT随温度升高而增大，在800K时达到最大值1。
We have investigated the influence of nickel doping in a series of n-type CoSb{sub 3} skutterudite materials partially filled with Ca. The electrical resistivity, thermopower, and thermal conductivity have been measured in the 300-800 K temperature range on Ca{sub y}Co{sub 1-x}Ni{sub x}Sb{sub 12} compounds prepared by a powder metallurgy route. The chemical composition and structure have been analyzed by electron probe microanalyses and x-ray diffraction, respectively. It was found that the presence of nickel substantially decreases the electrical resistivity without any detrimental effect on the thermopower, resulting in an improvement of the power factor. The dimensionless thermoelectric figure ZT increases with increasing temperature and reaches a maximum value of 1 at 800 K.